Liquid flask



FIG. 1 is a perspective view of a first embodiment of a liquid flask showing my new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a second side elevation view thereof;

FIG. 4 is a third side elevation view thereof;

FIG. 5 is a fourth side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an exploded perspective view thereof with an outer lid removed;

FIG. 9 is an exploded perspective view thereof with an outer lid and an inner cup removed;

FIG. 10 is an exploded perspective view thereof, lacking the inner cup and with an outer lid removed;

FIG. 11 is a perspective view of a second embodiment of a liquid flask showing my new design;

FIG. 12 is a side elevation view thereof;

FIG. 13 is a second side elevation view thereof;

FIG. 14 is a third side elevation view thereof;

FIG. 15 is a fourth side elevation view thereof;

FIG. 16 is a top plan view thereof;

FIG. 17 is a bottom plan view thereof;

FIG. 18 is an exploded perspective view thereof with an outer lid removed;

FIG. 19 is an exploded perspective view thereof with an outer lid and an inner cup removed; and,

FIG. 20 is an exploded perspective view thereof, lacking the inner cup and with an outer lid removed.

The broken lines in the drawings illustrate environmental structure on the article and form no part of the claimed design. 

I claim the ornamental design for a liquid flask, as shown and described. 